Validate integer with a comma thousands seperator using struts Validator

Question

Using struts validator.
have to validate the user entered value.
The value entered should be a positive integer with a comma thousands seperator. the number need not be in thousands.
I have as below to check for positive integer without comma seperator. but not sure how to validate if the user entered value with a comma seperator?
i.e value like 25,349 // how to validate this?
<field property="hrs" depends="integer,validwhen">
<msg name="integer" key="errors.notvalid"/>
<msg name="validwhen" key="errors.notvalid"/>
<var>
<var-name>test</var-name>
<var-value>(*this* >= 0)</var-value>
</var>
</field>
how to validate the user entered value with a comma seperator? Thanks.

Answer 1

Found this in Struts' Building View Components section: Note: If your required form property is one of the Java object representations of primitive types (ie. java.lang.Integer), you must set the ActionServlet's convertNull init. parameter to true. Failing to do this will result in the required validation not being performed on that field because it will default to 0. This seems to be part of my problem. With it turned on, Validator picks up that the value is required. Now to figure out the issue with putting in a double value instead of an Integer.